pink noise through mids help?

[bolanorthhighlands]

I've tried grounding my amp on the secondary batt. I've tried grounding my amp on the metal in the car. I've tried smaller amps but no. My secondary batt is grounded good and all power wires are fused. My amps are both grounded on the same piece of metal. They're not grounded on my secondary batt. I switch my rcas all the time. 4v preout rca (3 sets) whatever is 4v preout. When I lower the ohm load, the noise gets louder. I turn the amps all the way down to try to lower noise. No relay on remote. No processor. No line driver

[_paralyzed_]

^^^pioneer head unit, blown pico fuse

[bolanorthhighlands]

Don't know what that is. I was thinking a new head unit